5.9.4 Write-protecting tape cartridgesAll rewritable data cartridges have a write-protect switch to prevent accidental erasure or overwriting ofdata. Before loading a cartridge into the library, make sure the write-protect switch on the front of thecartridge is in the desired position. Slide the switch to the right to write-protect the cartridge. A small pad-lock is visible indicating thatthe cartridge is write-protected (see Figure 25). Slide the switch to the left to allow the library to write data to the cartridge (see Figure 25).Figure 25 Write-protecting the Ultrium data cartridgeNumber Description1 Write-enabled2 Write-protected3 Write-protect switch4 Barcode label5 Insertion arrow5.9.5 Backward read compatibilitySee compatibility guide of tape drives used.5.9.6 Barcode readerThe barcode reader provides inventory feedback to the host application and/or LCD screen by readingthe cartridge barcode labels. The library stores the customized inventory data in memory.5.9.7 MagazinesCartridges are stored in magazines. Up to 12 cartridges can be stored in each magazine.Magazines may be removed and inserted individually.The actiLib Library 2U has two removable magazines. Magazine access can be password protected.For safety reasons, the robotic motion is stopped when a magazine is removed.The magazines can be released using the Operator Control Panel (OCP) or the Remote ManagementUnit (RMU) In case the OCP or RMU initiated process has failed or the library no longer has power amanual emergency release is available.IMPORTANT: To manually release a magazine, see „Magazine emergency relase” on page 73.However, this manual process should only be used if the magazine cannot be releasedusing the Operator Control Panel or the Remote Management Unit.